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Asterisk AEL Extensions Security Bypass
Secunia Advisory: SA24694
Release Date: 2007-04-03
Popularity: 4,974 views

Critical:
Less critical
Impact: Security Bypass
Where: From remote
Solution Status: Vendor Workaround

Software:Asterisk 1.x

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CVE reference:CVE-2007-1595


Description:
A security issue has been reported in Asterisk, which can be exploited by malicious people to bypass certain security restrictions.

The security issue is caused due to a problem within the AEL (Asterisk Extension Language) when generating switch extensions. Depending on the extension, an attacker may be able to guess and dial a special number, which could allow him to e.g. listen to the voicemails of other users.

Solution:
Fixed in the SVN repository.

Provided and/or discovered by:
Philipp Kempgen

Original Advisory:
http://bugs.digium.com/view.php?id=9316

http://lists.digium.com/pipermail/asterisk-dev/2007-March/026647.html


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